Jack



FIG. 1 is a right side perspective view of a jack etc. showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a front view thereof, wherein the broken line showing of the big claw is for illustrative purposes only and forming no part of the claimed design; and,

FIG. 9 is a front view thereof, wherein the broken line showing of the small claw is for illustrative purposes only and forming no part of the claimed design. 

The ornamental design for a jack, as shown and described. 